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参数资料
| 型号： | MAX8515EXK+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 5/10页 |
| 文件大小： | 0K |
| 描述： | IC VREF SHUNT ADJ SC705 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 基准类型： | 分流器，可调式 |
| 输出电压： | 0.2 V ~ 18 V |
| 容差： | ±1% |
| 输入电压： | 1.7 V ~ 28 V |
| 通道数： | 1 |
| 电流 - 阴极： | 4mA |
| 电流 - 输出： | 20mA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 6-TSSOP（5 引线），SC-88A，SOT-353 |
| 供应商设备封装： | SC-70-5 |
| 包装： | 带卷 (TR) |
Wide-Input 0.6V Shunt Regulators for
Isolated DC-to-DC Converters
V IN
1.8V
5.6V
R3
V OUT
0.6V/20mA
3.3V
1k ?
TEST
IN
OUT
R1 = SHORT
R2 = OPEN
V OUT = 0.6V
TEST CIRCUIT
2.2nF
1M ?
C1
0.1 μ F
MAX8515A
MAX8515
PGND
GND
FB
R1
R2
C2
1.0 μ F
V IN (V) R3 ( ? )
3.3 135
10 470
28 1.33k
0.1 μ F
IN
MAX8515A
MAX8515
PGND
GND
OUT
FB
0.82 μ F ??
50k ?
2.2nF
REFERENCE
NETWORK
ANALYZER
SOURCE
1M ?
Figure 1. MAX8515A/MAX8515 Typical Application Circuit,
Shunt Regulator/Adjustable Voltage Reference
Optical Feedback
GAIN = TEST/REFERENCE
11V
Setting V OUT
Figure 3 displays an application circuit using the
MAX8515A/MAX8515 in an opto-isolated feedback cir-
3.3V
115k ?
1%
2.2nF
TEST
1M ?
cuit. The maximum bias current for the photodiode is
set with R1. The isolated DC-to-DC converter compen-
sation circuit is formed with R2, C3, and C4. Resistors
V OUT = 6V
TEST CIRCUIT
160k ?
R3 and R4 set the isolated DC-to-DC converter output
voltage. C1 decouples the input supply and C2 is
needed to stabilize the MAX8515A/MAX8515. Calculate
V REG with the following equation:
0.1 μ F
IN
MAX8515A
MAX8515
OUT
0.1 μ F
50k ?
V REG = 0 . 6 × ? 1 +
?
?
?
R3 ?
R4 ?
PGND
GND
FB
90.1k ?
1%
2.2nF
NETWORK
ANALYZER
SOURCE
R3 = ? OUT - 1 ? × R 4
Set R4 to 10k? and calculate R3 by:
? V ?
? V FB ?
GAIN = TEST/REFERENCE
10k ?
1%
1M ?
REFERENCE
For example, given a regulator output voltage of 1.8V
and R4 = 10k ? , R3 is found to be 20k ? .
Compensation Circuit
Figure 2. Test Circuits for Gain and Phase Plots
The midband gain is given by:
A typical compensation scheme is depicted in Figure 3.
C3 provides an integrator function that minimizes out-
A =
R2
R3
f Z =
put regulation error.
R2 provides additional phase compensation at the zero
frequency f z :
1
2 π × R2 × C3
Add C4 for high-frequency noise rejection. Determine
R2 based on the midband gain required by the isolated
power supply. Choose f z based on the power supply
small-signal transfer function. Calculate C3 once f z
is known.
_______________________________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8515EZK | 制造商:Maxim Integrated Products 功能描述:WIDE-INPUT 0.6V SHUNT REGULATOR FOR - Rail/Tube |
| MAX8515EZK+ | 制造商:Maxim Integrated Products 功能描述:WIDE-INPUT 0.6V SHUNT REGULATOR FOR ISOLATED - Rail/Tube |
| MAX8515EZK-T | 功能描述:基准电压& 基准电流 RoHS:否 制造商:STMicroelectronics 产品:Voltage References 拓扑结构:Shunt References 参考类型:Programmable 输出电压:1.24 V to 18 V 初始准确度:0.25 % 平均温度系数（典型值）:100 PPM / C 串联 VREF - 输入电压（最大值）: 串联 VREF - 输入电压（最小值）: 分流电流（最大值）:60 mA 最大工作温度:+ 125 C 封装 / 箱体:SOT-23-3L 封装:Reel |
| MAX8516EUB | 功能描述:低压差稳压器 - LDO RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| MAX8516EUB/GG8 | 制造商:Maxim Integrated Products 功能描述:1.425V TO 3.6V INPUT, 1A, 0.2V DROPOUT LDO RE - Bulk |
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